<template>
  <div class="block">
    <span class="demonstration">默认 click 触发子菜单</span>
    <el-cascader
      ref='cas'
      v-model="value"
      :options="options"
      @visible-change="visible"
      @expand-change="exchange"
      @change="handleChange"
    ></el-cascader>
  </div>
</template>

<script>
export default {
  data() {
    return {
      value: [],
      options: [{
        value: 'zhinan',
        label: '指南',
        children: []
      }, {
        value: 'zujian',
        label: '组件',
        children: [{
          value: 'basic',
          label: 'Basic',
          children: [{
            value: 'layout',
            label: 'Layout 布局'
          }, {
            value: 'color',
            label: 'Color 色彩'
          }, {
            value: 'typography',
            label: 'Typography 字体'
          }, {
            value: 'icon',
            label: 'Icon 图标'
          }, {
            value: 'button',
            label: 'Button 按钮'
          }]
        }, {
          value: 'form',
          label: 'Form',
          children: [{
            value: 'radio',
            label: 'Radio 单选框'
          }, {
            value: 'checkbox',
            label: 'Checkbox 多选框'
          }, {
            value: 'input',
            label: 'Input 输入框'
          }, {
            value: 'input-number',
            label: 'InputNumber 计数器'
          }, {
            value: 'select',
            label: 'Select 选择器'
          }, {
            value: 'cascader',
            label: 'Cascader 级联选择器'
          }, {
            value: 'switch',
            label: 'Switch 开关'
          }, {
            value: 'slider',
            label: 'Slider 滑块'
          }, {
            value: 'time-picker',
            label: 'TimePicker 时间选择器'
          }, {
            value: 'date-picker',
            label: 'DatePicker 日期选择器'
          }, {
            value: 'datetime-picker',
            label: 'DateTimePicker 日期时间选择器'
          }, {
            value: 'upload',
            label: 'Upload 上传'
          }, {
            value: 'rate',
            label: 'Rate 评分'
          }, {
            value: 'form',
            label: 'Form 表单'
          }]
        }, {
          value: 'data',
          label: 'Data',
          children: [{
            value: 'table',
            label: 'Table 表格'
          }, {
            value: 'tag',
            label: 'Tag 标签'
          }, {
            value: 'progress',
            label: 'Progress 进度条'
          }, {
            value: 'tree',
            label: 'Tree 树形控件'
          }, {
            value: 'pagination',
            label: 'Pagination 分页'
          }, {
            value: 'badge',
            label: 'Badge 标记'
          }]
        }, {
          value: 'notice',
          label: 'Notice',
          children: [{
            value: 'alert',
            label: 'Alert 警告'
          }, {
            value: 'loading',
            label: 'Loading 加载'
          }, {
            value: 'message',
            label: 'Message 消息提示'
          }, {
            value: 'message-box',
            label: 'MessageBox 弹框'
          }, {
            value: 'notification',
            label: 'Notification 通知'
          }]
        }, {
          value: 'navigation',
          label: 'Navigation',
          children: [{
            value: 'menu',
            label: 'NavMenu 导航菜单'
          }, {
            value: 'tabs',
            label: 'Tabs 标签页'
          }, {
            value: 'breadcrumb',
            label: 'Breadcrumb 面包屑'
          }, {
            value: 'dropdown',
            label: 'Dropdown 下拉菜单'
          }, {
            value: 'steps',
            label: 'Steps 步骤条'
          }]
        }, {
          value: 'others',
          label: 'Others',
          children: [{
            value: 'dialog',
            label: 'Dialog 对话框'
          }, {
            value: 'tooltip',
            label: 'Tooltip 文字提示'
          }, {
            value: 'popover',
            label: 'Popover 弹出框'
          }, {
            value: 'card',
            label: 'Card 卡片'
          }, {
            value: 'carousel',
            label: 'Carousel 走马灯'
          }, {
            value: 'collapse',
            label: 'Collapse 折叠面板'
          }]
        }]
      }, {
        value: 'ziyuan',
        label: '资源',
        children: [{
          value: 'axure',
          label: 'Axure Components'
        }, {
          value: 'sketch',
          label: 'Sketch Templates'
        }, {
          value: 'jiaohu',
          label: '组件交互文档'
        }]
      }]
    }
  },
  methods: {
    visible(v) {
      // console.log(arguments)
      // debugger
      if (v) {
        if (this.orginValue && this.orginValue === this.value) {
          this.el.forEach(element => {
            element.click()
          })
        } else if (this.value) {
          this.orginValue = this.value
          this.el = this.$refs['cas'].panel.$el.querySelectorAll('.in-active-path')
          console.log(this.el)
        }
      }
    },
    exchange(val) {
      console.log(val)
      if (val[val.length - 1] === 'shejiyuanze') {
        setTimeout(() => {
          Promise.resolve().then(() => {
            let the = this.options.findX([{ value: val[0] }, 'children', { value: val[1] }])
            the.children = [
              {
                value: 'yizhi',
                label: '一致'
              }, {
                value: 'fankui',
                label: '反馈'
              }, {
                value: 'xiaolv',
                label: '效率'
              }, {
                value: 'kekong',
                label: '可控'
              }
            ]
          })
        }, 0)
      } else if (val[val.length - 1] === 'zhinan') {
        setTimeout(() => {
          Promise.resolve().then(() => {
            let the = this.options.findX([{ value: val[0] }])
            the.children = [{
              value: 'shejiyuanze',
              label: '设计原则',
              children: []
            }, {
              value: 'daohang',
              label: '导航',
              children: [{
                value: 'cexiangdaohang',
                label: '侧向导航'
              }, {
                value: 'dingbudaohang',
                label: '顶部导航'
              }]
            }]
          })
        }, 0)
      }
    },
    focus() {
      // debugger
    },
    handleChange(value) {
      console.log(value)
    }
  }
}
</script>
